Docker stack : mysql, wordpress:php7.2-fpm-alpine and nginx:stable-alpine

stack.yml

version: '3.1'

services:

  mysql-wordpress:
    image: mysql:5
    networks:
      - mysql
    restart: always
#     ports:
#       - 3306:3306
    environment:
      MYSQL_DATABASE: wordpress
      MYSQL_USER: username
      MYSQL_PASSWORD: password
      MYSQL_RANDOM_ROOT_PASSWORD: '1'

  wordpress-fpm:
    image: wordpress:php7.2-fpm-alpine
    networks:
      - mysql
      - nginx
    volumes:
      - ./${APPD:-app}:/var/www/html
#     ports:
#       - 9000:9000
    depends_on:
      - mysql-wordpress
    entrypoint:
      - ""
    command:
      - php-fpm

  nginx:
    image: nginx:stable-alpine
    networks:
      - nginx
    volumes:
      - ./nginx/conf.d:/etc/nginx/conf.d
      - ./nginx/CA:/etc/nginx/CA
      - ./${APPD:-app}:/var/www/html
    ports:
      - 80:80
      - 443:443
    depends_on:
      - wordpress-fpm

networks:
  mysql:
  nginx: